Commit | Line | Data |
---|---|---|
5d2b030a SG |
1 | /* Remote serial interface for local (hardwired) serial ports for GO32. |
2 | Copyright 1992, 1993 Free Software Foundation, Inc. | |
ae0ea72e SC |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
ae0ea72e SC |
20 | #include "defs.h" |
21 | #include "serial.h" | |
5140562f | 22 | #include <sys/dos.h> |
ae0ea72e | 23 | |
38dc5e12 SG |
24 | /* This is unused for now. We just return a placeholder. */ |
25 | struct go32_ttystate | |
26 | { | |
27 | int bogus; | |
28 | }; | |
29 | ||
452b4b00 SG |
30 | typedef struct { |
31 | short jmp_op; | |
32 | short signature; | |
33 | short version; | |
34 | short buffer_start; | |
35 | short buffer_end; | |
36 | short getp; | |
37 | short putp; | |
38 | short iov; | |
39 | } ASYNC_STRUCT; | |
40 | ||
38dc5e12 SG |
41 | static int go32_open PARAMS ((serial_t scb, const char *name)); |
42 | static void go32_raw PARAMS ((serial_t scb)); | |
43 | static int wait_for PARAMS ((serial_t scb, int timeout)); | |
44 | static int go32_readchar PARAMS ((serial_t scb, int timeout)); | |
45 | static int rate_to_code PARAMS ((int rate)); | |
46 | static int go32_setbaudrate PARAMS ((serial_t scb, int rate)); | |
47 | static int go32_write PARAMS ((serial_t scb, const char *str, int len)); | |
48 | static void go32_restore PARAMS ((serial_t scb)); | |
49 | static void go32_close PARAMS ((serial_t scb)); | |
452b4b00 | 50 | static serial_ttystate go32_get_tty_state PARAMS ((serial_t scb)); |
38dc5e12 | 51 | static int go32_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); |
a037b21e | 52 | static int strncasecmp PARAMS ((const char *str1, const char *str2, int len)); |
38dc5e12 SG |
53 | static char *aptr PARAMS ((short p)); |
54 | static ASYNC_STRUCT *getivec PARAMS ((int which)); | |
55 | static int dos_async_init PARAMS ((int port)); | |
56 | static void dos_async_tx PARAMS ((const char c)); | |
57 | static int dos_async_ready PARAMS (()); | |
58 | static int dos_async_rx PARAMS (()); | |
59 | static int dosasync_read PARAMS ((int fd, char *buf, int len, int timeout)); | |
452b4b00 | 60 | static int dosasync_write PARAMS ((int fd, const char *buf, int len)); |
38dc5e12 | 61 | |
ae0ea72e SC |
62 | #define SIGNATURE 0x4154 |
63 | #define VERSION 1 | |
64 | #define OFFSET 0x104 | |
65 | ||
ae0ea72e | 66 | #define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b))) |
ae0ea72e | 67 | |
5d2b030a | 68 | static ASYNC_STRUCT *async; |
ae0ea72e SC |
69 | static int iov; |
70 | #define com_rb iov | |
71 | #define com_tb iov | |
72 | #define com_ier iov+1 | |
73 | #define com_ifr iov+2 | |
74 | #define com_bfr iov+3 | |
75 | #define com_mcr iov+4 | |
76 | #define com_lsr iov+5 | |
77 | #define com_msr iov+6 | |
78 | ||
b83bf6b3 SG |
79 | static int |
80 | strncasecmp(str1, str2, len) | |
a037b21e | 81 | const char *str1, *str2; |
b83bf6b3 SG |
82 | register int len; |
83 | { | |
84 | unsigned char c1, c2; | |
85 | ||
86 | for (; len != 0; --len) | |
87 | { | |
88 | c1 = *str1++; | |
89 | c2 = *str2++; | |
90 | ||
91 | if (toupper(c1) != toupper(c2)) | |
92 | return toupper(c1) - toupper(c2); | |
93 | ||
94 | if (c1 == '\0') | |
95 | return 0; | |
96 | } | |
97 | return 0; | |
98 | } | |
b52373a2 | 99 | |
5d2b030a SG |
100 | static char * |
101 | aptr(p) | |
102 | short p; | |
ae0ea72e | 103 | { |
ae0ea72e | 104 | return (char *)((unsigned)async - OFFSET + p); |
ae0ea72e SC |
105 | } |
106 | ||
5d2b030a | 107 | static ASYNC_STRUCT * |
b52373a2 | 108 | getivec(int which) |
ae0ea72e | 109 | { |
5d2b030a | 110 | ASYNC_STRUCT *a; |
ae0ea72e SC |
111 | |
112 | if (peek(0, which*4) != OFFSET) | |
113 | return 0; | |
b83bf6b3 | 114 | |
ae0ea72e SC |
115 | a = (ASYNC_STRUCT *)(0xe0000000 + peek(0, which*4+2)*16 + peek(0, which*4)); |
116 | ||
ae0ea72e SC |
117 | if (a->signature != SIGNATURE) |
118 | return 0; | |
b83bf6b3 | 119 | |
ae0ea72e SC |
120 | if (a->version != VERSION) |
121 | return 0; | |
b83bf6b3 | 122 | |
ae0ea72e SC |
123 | return a; |
124 | } | |
125 | ||
5d2b030a | 126 | static int |
b83bf6b3 SG |
127 | dos_async_init(port) |
128 | int port; | |
ae0ea72e SC |
129 | { |
130 | int i; | |
b83bf6b3 SG |
131 | |
132 | switch (port) | |
07861607 | 133 | { |
b83bf6b3 SG |
134 | case 1: |
135 | async = getivec (12); | |
136 | break; | |
137 | case 2: | |
138 | async = getivec (11); | |
139 | break; | |
140 | default: | |
141 | return 0; | |
07861607 SG |
142 | } |
143 | ||
b83bf6b3 | 144 | if (!async) |
07861607 | 145 | { |
a037b21e | 146 | error("GDB cannot connect to asynctsr program, check that it is installed\n\ |
ae0ea72e SC |
147 | and that serial I/O is not being redirected (perhaps by NFS)\n\n\ |
148 | example configuration:\n\ | |
a037b21e SG |
149 | C> mode com%d:9600,n,8,1,p\n\ |
150 | C> asynctsr %d\n\ | |
151 | C> gdb \n", port, port); | |
07861607 SG |
152 | } |
153 | ||
ae0ea72e SC |
154 | iov = async->iov; |
155 | outportb(com_ier, 0x0f); | |
156 | outportb(com_bfr, 0x03); | |
157 | outportb(com_mcr, 0x0b); | |
158 | async->getp = async->putp = async->buffer_start; | |
159 | ||
b83bf6b3 | 160 | return 1; |
ae0ea72e SC |
161 | } |
162 | ||
5d2b030a SG |
163 | static void |
164 | dos_async_tx(c) | |
165 | const char c; | |
ae0ea72e | 166 | { |
ae0ea72e | 167 | while (~inportb(com_lsr) & 0x20); |
5d2b030a | 168 | |
ae0ea72e | 169 | outportb(com_tb, c); |
ae0ea72e SC |
170 | } |
171 | ||
5d2b030a | 172 | static int |
b52373a2 | 173 | dos_async_ready() |
ae0ea72e SC |
174 | { |
175 | return (async->getp != async->putp); | |
176 | } | |
177 | ||
5d2b030a | 178 | static int |
b52373a2 | 179 | dos_async_rx() |
ae0ea72e SC |
180 | { |
181 | char rv; | |
5d2b030a | 182 | |
ae0ea72e | 183 | while (!dos_async_ready()) |
5d2b030a SG |
184 | if (kbhit()) |
185 | { | |
186 | printf("abort!\n"); | |
187 | return 0; | |
188 | } | |
189 | ||
ae0ea72e | 190 | rv = *aptr(async->getp++); |
ae0ea72e | 191 | if (async->getp >= async->buffer_end) |
5d2b030a | 192 | async->getp = async->buffer_start; |
ae0ea72e | 193 | |
5d2b030a | 194 | return rv; |
ae0ea72e SC |
195 | } |
196 | ||
5d2b030a SG |
197 | static int |
198 | dosasync_read (fd, buf, len, timeout) | |
199 | int fd; | |
200 | char *buf; | |
201 | int len; | |
202 | int timeout; | |
ae0ea72e SC |
203 | { |
204 | long now, then; | |
5d2b030a SG |
205 | int l = len; |
206 | ||
ae0ea72e | 207 | time (&now); |
5d2b030a SG |
208 | then = now + timeout; |
209 | ||
ae0ea72e | 210 | while (l--) |
ae0ea72e | 211 | { |
5d2b030a SG |
212 | if (timeout) |
213 | { | |
214 | while (!dos_async_ready()) | |
215 | { | |
216 | time (&now); | |
217 | if (now >= then) | |
218 | return len - l - 1; | |
219 | } | |
220 | } | |
221 | *buf++ = dos_async_rx(); | |
ae0ea72e | 222 | } |
ae0ea72e | 223 | |
5d2b030a | 224 | return len; |
ae0ea72e SC |
225 | } |
226 | ||
5d2b030a SG |
227 | static int |
228 | dosasync_write(fd, buf, len) | |
229 | int fd; | |
230 | const char *buf; | |
231 | int len; | |
232 | { | |
233 | int l = len; | |
ae0ea72e | 234 | |
5d2b030a SG |
235 | while (l--) |
236 | dos_async_tx (*buf++); | |
ae0ea72e | 237 | |
5d2b030a | 238 | return len; |
ae0ea72e SC |
239 | } |
240 | ||
5d2b030a SG |
241 | static int |
242 | go32_open (scb, name) | |
243 | serial_t scb; | |
244 | const char *name; | |
b52373a2 | 245 | { |
b83bf6b3 SG |
246 | int port; |
247 | ||
248 | if (strncasecmp (name, "com", 3) != 0) | |
249 | { | |
250 | errno = ENOENT; | |
4febd102 | 251 | return -1; |
b83bf6b3 SG |
252 | } |
253 | ||
254 | port = name[3] - '0'; | |
255 | ||
256 | if ((port != 1) && (port != 2)) | |
257 | { | |
258 | errno = ENOENT; | |
4febd102 | 259 | return -11; |
b83bf6b3 SG |
260 | } |
261 | ||
262 | scb->fd = dos_async_init(port); | |
07861607 | 263 | if (!scb->fd) |
4febd102 | 264 | return -1; |
ae0ea72e | 265 | |
5d2b030a | 266 | return 0; |
ae0ea72e SC |
267 | } |
268 | ||
5d2b030a SG |
269 | static void |
270 | go32_raw (scb) | |
271 | serial_t scb; | |
ae0ea72e | 272 | { |
5d2b030a | 273 | /* Always in raw mode */ |
ae0ea72e SC |
274 | } |
275 | ||
5d2b030a SG |
276 | static int |
277 | go32_readchar (scb, timeout) | |
278 | serial_t scb; | |
279 | int timeout; | |
ae0ea72e SC |
280 | { |
281 | char buf; | |
5d2b030a SG |
282 | |
283 | if (dosasync_read(scb->fd, &buf, 1, timeout)) | |
5a6242dd | 284 | return buf; |
ae0ea72e | 285 | else |
4febd102 | 286 | return SERIAL_TIMEOUT; |
ae0ea72e SC |
287 | } |
288 | ||
38dc5e12 SG |
289 | /* go32_{get set}_tty_state() are both dummys to fill out the function |
290 | vector. Someday, they may do something real... */ | |
291 | ||
292 | static serial_ttystate | |
293 | go32_get_tty_state(scb) | |
294 | serial_t scb; | |
295 | { | |
296 | struct go32_ttystate *state; | |
297 | ||
298 | state = (struct go32_ttystate *)xmalloc(sizeof *state); | |
299 | ||
300 | return (serial_ttystate)state; | |
301 | } | |
302 | ||
303 | static int | |
304 | go32_set_tty_state(scb, ttystate) | |
305 | serial_t scb; | |
306 | serial_ttystate ttystate; | |
307 | { | |
308 | struct go32_ttystate *state; | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
5d2b030a SG |
313 | static int |
314 | go32_setbaudrate (scb, rate) | |
315 | serial_t scb; | |
316 | int rate; | |
ae0ea72e SC |
317 | { |
318 | return 0; | |
319 | } | |
320 | ||
5d2b030a SG |
321 | static int |
322 | go32_write (scb, str, len) | |
323 | serial_t scb; | |
324 | const char *str; | |
325 | int len; | |
326 | { | |
327 | dosasync_write(scb->fd, str, len); | |
4febd102 SG |
328 | |
329 | return 0; | |
5d2b030a SG |
330 | } |
331 | ||
332 | static void | |
452b4b00 SG |
333 | go32_close (scb) |
334 | serial_t scb; | |
ae0ea72e | 335 | { |
ae0ea72e SC |
336 | } |
337 | ||
5d2b030a SG |
338 | static struct serial_ops go32_ops = |
339 | { | |
340 | "hardwire", | |
341 | 0, | |
342 | go32_open, | |
343 | go32_close, | |
344 | go32_readchar, | |
345 | go32_write, | |
346 | go32_raw, | |
38dc5e12 SG |
347 | go32_get_tty_state, |
348 | go32_set_tty_state, | |
5d2b030a SG |
349 | go32_setbaudrate |
350 | }; | |
351 | ||
352 | _initialize_ser_go32 () | |
ae0ea72e | 353 | { |
5d2b030a | 354 | serial_add_interface (&go32_ops); |
ae0ea72e | 355 | } |